package com.jewaton.authmanage.security;

import java.util.Collection;
import java.util.Iterator;

import org.springframework.security.access.AccessDecisionManager;
import org.springframework.security.access.AccessDeniedException;
import org.springframework.security.access.ConfigAttribute;
import org.springframework.security.access.SecurityConfig;
import org.springframework.security.authentication.InsufficientAuthenticationException;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.GrantedAuthority;

public class CustomAccessDecisionManager implements AccessDecisionManager {

	@Override
	public void decide(Authentication authentication, Object object,
			Collection<ConfigAttribute> configAttributes)
			throws AccessDeniedException, InsufficientAuthenticationException {
		if(configAttributes==null)
			return ;
		
		Iterator<ConfigAttribute> it = configAttributes.iterator();
		while(it.hasNext()){
			ConfigAttribute cfgAttr = it.next();
			String needRole  = ((SecurityConfig) cfgAttr).getAttribute();
			for(GrantedAuthority ga : authentication.getAuthorities()){
				if(needRole.trim().equalsIgnoreCase(ga.getAuthority())){
					return ;
				}
			}
		}
		
		throw new AccessDeniedException("没有权限访问");
	}

	@Override
	public boolean supports(ConfigAttribute attribute) {
		return true;
	}

	@Override
	public boolean supports(Class<?> clazz) {
		return true;
	}

}
